Water stress - responses of plants to stress, Biology

Water Stress - Responses of Plants to Stress

Water stress in a plant can result from drought, excess salinity in the soil and very low or high temperatures. It has been found that during water stress certain organic compounds such as sucrose and amino acids particularly proline accumulate and thus lower the osmotic potential in the cells. But the metabolic activity of the cell is not much affected.

However, the activity of some enzymes such as nitrate reductase and phenylalanine ammonia lyase decreases while activity of degrading enzymes like α-amylase and ribonucleases increases. It is proposed that the enzymes break down starch and other molecules into their monomeric units which make osmotic potential of the cells more negative.

Posted Date: 1/18/2013 12:16:31 AM | Location : United States







Related Discussions:- Water stress - responses of plants to stress, Assignment Help, Ask Question on Water stress - responses of plants to stress, Get Answer, Expert's Help, Water stress - responses of plants to stress Discussions

Write discussion on Water stress - responses of plants to stress
Your posts are moderated
Related Questions
Which of the following is true for a toe corticospinal interneuron that produces action potentials during voluntary movements of the big toe of the right foot? A. Its dendrites

Define the Prevention of Adverse Food Reactions? Considering the increasing incidence, cost and morbidity associated with allergic reactions, it is perhaps useful to design pre

Chromosomes with spindle fiber: The kinetochore fibers of spindle attach to the kinetochore region (specialized area in centromere) of chromosome, and align them at the equator of

Anaerobic Oxidation Embden Meyerhof pathway The initial  stage of biological oxidiation  includes  a series of nine  main sequential   steps  of reactions  known  as Embd

What are the main cellular features of fungi? There are unicellular and pluricellular fungi. All fungi are eukaryotes and heterotrophs. Fungi have cells with cell wall made

Cover (area occupied) - Quantitative Characters Cover or specifically herbage cover refers primarily to the area of ground occupied by the leaves, stems and inflorescence i.e.

Growth Charts Management alone without any standard of comparison do not serve useful purpose. A number of standards have been developed to compare the measurement of any

Kinds of Hermaphroditism Depending upon the timing of maturity of the gonads, hermaphroditism can be of two types 1. Simultaneous hermaphroditism . Both male and female g

general character of class sarcodina

HARD Y - WEINBERG LAW - Proposed by G.H. Hardy and W. Weinberg in 1908 independently. The law states "the frequency of genes or alleles in a population remains constant